package com.sakura.eduservice.listener;

import com.alibaba.excel.context.AnalysisContext;
import com.alibaba.excel.event.AnalysisEventListener;
import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;
import com.sakura.eduservice.entity.EduSubject;
import com.sakura.eduservice.entity.excel.SubjectData;
import com.sakura.eduservice.service.EduSubjectService;
import com.sakura.servicebase.exceptionhandler.GuliException;

public class SubjectExcelListener extends AnalysisEventListener<SubjectData> {

    public EduSubjectService subjectService;

    public SubjectExcelListener() {}

    public SubjectExcelListener(EduSubjectService subjectService){
        this.subjectService = subjectService;
    }

    /**读取excel内容,一行一行进行读取*/
    @Override
    public void invoke(SubjectData subjectData, AnalysisContext analysisContext) {
        if (subjectData == null){
            throw new GuliException(20001,"文件数据为空");
        }

        //一行一行读取,每次读取有两个值,第一个值为一级分类,第二个值为二级分类
        //判断一级分类是否重复
        EduSubject existOneSubject = this.existOneSubject(subjectService,subjectData.getOneSubjectName());
        if (existOneSubject==null){
            //没有相同一级分类,进行添加
            existOneSubject = new EduSubject();
            existOneSubject.setParentId("0").setTitle(subjectData.getOneSubjectName());
            subjectService.save(existOneSubject);
        }

        //获取一级分类的id值
        String pid = existOneSubject.getId();

        //添加二级分类
        EduSubject existTwoSubject = this.existTwoSubject(subjectService,subjectData.getTwoSubjectName(),pid);
        if (existTwoSubject == null){
            existTwoSubject = new EduSubject();
            existTwoSubject.setParentId(pid).setTitle(subjectData.getTwoSubjectName());
            subjectService.save(existTwoSubject);
        }

    }

    //判断一级分类不能重复添加
    private EduSubject existOneSubject(EduSubjectService subjectService,String name){
        QueryWrapper<EduSubject> wrapper = new QueryWrapper<>();
        wrapper.eq("title",name).eq("parent_id","0");
        return subjectService.getOne(wrapper);
    }

    //判断二级分类不能重复添加
    private EduSubject existTwoSubject(EduSubjectService subjectService,String name,String pid){
        QueryWrapper<EduSubject> wrapper = new QueryWrapper<>();
        wrapper.eq("title",name).eq("parent_id",pid);
        return subjectService.getOne(wrapper);
    }

    @Override
    public void doAfterAllAnalysed(AnalysisContext analysisContext) {

    }
}





















